ICD-10 Code M05.361 – Rheumatoid heart disease with rheumatoid arthritis of right knee (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.361 – Rheumatoid heart disease with rheumatoid arthritis of right knee
What it is
This code identifies rheumatoid arthritis affecting the right knee, with associated rheumatoid heart disease. Use it when documentation clearly links both the joint disease and the cardiac involvement.
Clinical signs
Clinical features vary; refer to documentation. You may see chronic inflammatory joint pain, swelling, and stiffness in the right knee, along with documented cardiac manifestations attributed to rheumatoid disease.
When to use this code
Use this code when the provider states rheumatoid heart disease and specifies rheumatoid arthritis in the right knee. It fits visits where both conditions are actively documented, even if one is the primary reason for care. Check documentation if the cardiac relationship is unclear.
Do not use for
Do not use this code if the heart disease is not documented as rheumatoid or if the knee arthritis is not specified as right-sided. Do not assign it for nonspecific rheumatoid arthritis alone.
Coding tip
Confirm the exact anatomic site and the documented cardiac association before coding.